The K-frames are far from weak. They have a slight issue with but one bullet weight....125gr ammo. You can shoot hot stuff through them all day long, and it is doubtful you will ever see any wear. Shoot enought hot 125gr, and you will get some erosion and possibly stretch, but its doubtful.
I agree. All the hype about the "weak" K-frames are a joke. If they are so weak, and can't hold up to the .357 mag, then why does S&W still make a .357 mag J-frame? It's OK to buy it, as long as you don't shoot it?
Anyway, my first handgun I bought when I turned 21 (I had a LOT of them before through my father) was a 3" M65. Before I even fired a shot through it, I had Karl Sokol of Chestnut Mountain Sports bob the hammer, install an orange inlay in the front sight, buff the serrations off the trigger, round the cylinder release, chamfer the chambers and install hard nylon, smooth grips. I shot that revolver almost exclusively for many years, almost completely with 158gr magnum reloads. I did put probably 500 rounds of 125gr Federal JHP's through it for qualifications, but that's it.
I was told my my Chief at the time that I could no longer carry it on or off-duty due to its modifications. He only allowed stock guns. So, I traded it. I wish I never did now, but it seemed like the right thing to do at the time. After over 10,000 rounds, it was still tight and very accurate. I sure miss that revolver.
If anyone out there, probably in the NH/VT area has a 3" S&W M65 SN BPS1861, please contact me, I would trade a practically new one for it to get it back!